bettnne



' (No Model.) I 2 sheets-sheet 1.

A. 0. BRUNNE;

LAMP.

No. 404,162. Patented May 28, 1889..

WITNESSES:

(No Model.)

.2 SheetsSheet 2.

A. 0. BRUNNE LAMP.

Patented May Z8, 1889.

,jllilllll 1 mamwwlnll 1 INVENTOR ATTORNEZS h N PETERS,Fbolo-Lilhographun Washinglon. m;

UNITED STATES PATENT I OEEICE.

ALFRED O. BRUNNE, OF MERIDEN, CONNECTICUT.

LAMP.

SPECIFICATION forming part of Letters Patent No. 404,162, dated May 28,1889.

Application filed March l9 l 1888.

T0 aZZwhom it may concern.-

Be it known that I, ALFRED O. BRUNNE, of Meriden, in the county of NewHaven and State of Connecticut, have invented certain new and usefulImprovements in Lamps, of which the following is a specification.

This invention has reference to certain improvements in lamps with acentral draft, said improvements being designed with a view to producethe more perfect combustion of the oil by supplying an additionalquantity of oxygen to the outer as well as to the inner surface of thesame, whereby a whiter flame is produced at a saving of the illuminant.

The invention consists of certain details of construction andcombination of parts, which will be fully described hereinafter, andfinally pointed out in the claim.

In the accompanying drawings, Figure 1 represents a side elevation of myimproved lamp. Fig. 2 is a vertical transverse section of the upper orburner part of the same, drawn on a larger scale. Figs. 3 and 4. arerespectively a detail side elevation of the lower part of the interiordraft-cone and a horizontal section of the same on the line x a, Fig.4t.

Similar letters of reference indicate corresponding parts.

Referring to the drawings,A represents the fou nt of my improved lamp,which is provided with a central-draft tube, A, and a base, A havingopenings afor admitting the air to the central-draft tube A. Thecentral-draft tube A is rigidly secured to the bottom of the lamp-fount,as customary in centraldraft lamps of this class. A wick-holding tube,B, is arranged concentrically to the central-draft tube A and providedwith the usual slots or openings, d, for permitting the access of theoil to the wick C, which is interposed between the fixed draft-tube Aand the wick-holding tube B.

To the neck A of the fountA is applied, by

' a bayon et-joint, e, a perforated air-supply cylinder, E, as shown inFig. 1. The perforated cylinder E is provided with an interior tube, E,that is concentric to the central-draft tube A, and forms with the same,respectively, the outer and inner wick holding and guiding tubes.

The perforated cylinder E is provided with Serial No. 267,595. (Nomodel.)

a series of smallperforations, e, and with one or more rows of largerperforations, 6 which latter are arranged, preferably, at the upper orlower edge of the cylinder E, or at one or more intermediate points ofthe same. The smallerperforations, 6, supply a steady quantity of air,while the rows of larger perforations permit the entrance of extrasheets or bodies of air, which are supplied to the outer surface of theflame one to the base, the other to the upper part of the same. For thepurpose of preventing, however the too abrupt supply of too large aquantity of air to the outer surface of the flame, the chimneysupportinggallery E at the upper part of the perforated cylinder E is providedwith a perforated ring, 6 which is made either of a detaehable piece ofperforated sheet metal, or

integral with the gallery E as desired.

In the drawings the perforated rlng e is made of a separate piece ofsheet metal and fitted tightly around the outer wick-tube, E, as shownclearly in Fig. 2. 'lheperforated ring 6 serves as a screen forregulating and distributing the air in a uniform manner to the outersurface of the flame and prevents effectually the flickering of theflame, which would take place with a too large and unrestrained supplyof air to the outer surface of the flame. The gallery E is provided withthe usual spring-arms for supporting the lower contracted face of thechimney, the middle portion of which is bulged outwardly, so as toprovide for the necessary expansion of the flame.

The fixed central draft tube A is provided at some distance below itsupper edge with inwardly-proj eoting pins or studs f,which support thebase-ring Fof an inverted draftcone, F. The draft-cone F is open at thetop and bottom and attached by its contracted lower end to an interiorseat, f, of the basering F. Segmental openings f are arranged betweenthe inner seat, f, and the outer circumference of the base-ring F, so asto permit a separate current of air to pass between the draft-tube A andthe interior draft-cone, F, in upward direction to the inner surface ofthe flame, as shown by arrows in Fig. 2. The upper end of the draft-coneF is made flaring in outward direction, so as to direct the flame inconnection with a deflector, G, of inverted conical shapeavhichdetlector is made of somewhat larger diameter than the upper edge of thedraft-cone I! and extended above the same, so as to cause theimpingement ol' the air-current which is drawn up at the interior of thedraft-cone F on the upper part of the inner surface of the Ila-me. Theinterior aireurrent is heated. in its passage to the [lame to a highertemperature than the ant-current which drawn up in the annularchannelformed. between the draft-cone F and the lixed draft-tube A. As thehighly-heated air-current impinges on the inner surface of the flame ata point above the point of impiug'ementol the less-heated air-current,that passes in upward direction to the flame in the annular channel.formed by the draltcone and dral'ttube, a more perfect combustion of theoil-vapors takes place, so that consequently, in connection with thesteady supply of air to the outer surface of the (lame, a whiter tlameand a better light are obtained.

The detlector G is provided at its lower end with a perforated socket,g, which is supported on a shoulder, g, at the upper end of a spindle,G, which. passes centrally through the draft-mine l and is supported atits lower end in a central screw-eye, of a diametrical yoke, (l thatsccuredto the base-ring 11". The yoke (l is preferably made of U shapeand extended to some distance below the lower edge of the draft-cone lso as to obstruct as little as possible the free upward passage of theair to the interior of the cone F. The deflector ,l, the interiordraft-cone, F, and the base-ring 11", with its yoke G can be readilyremoved from the supportirig-studs f of the fixed draft-tube A, so as tobe readily cleaned and replaced.

The li'ountA is provided around the supporting 'neck A of the perforatedcylinder E with a drip gutter or trough A, which is shown in Fig. 2, andwhich serves to collect the oil that passes to the outside of the neckbythe so-called sweatine"of the lamp. The

oil thus collected in the drip-gutter A is graduall y evaporated b y theheating up of the neck of the fonnt, and the oil-vapors are drawn up andmingled with the upward currentof air that passes through the perforatedcylinder-cone, so that they are fed to the flame and burned by the same.

The essential features of my improved lamp consist in the uniformair-supply to the outer surface of the flame by means of the poi-[o.rated cylim'ler and the perforated distributing-ring ot' the gallery,and mainly of the interior detachable draft-cone and deflector, by meansof which two separate air-ci'nrents of different tem ')eratures areconducted to the inner surface of the flame, so that a more perfeetcombustion of the oil-vapors at the inner surface takes place, whichcould not be attained in the samedeeree in the central-draft lamps,owing to the insul'iicient supply of heated air to the inner surface ofthe flame.

llaving thus described myinvention, lelai m as new and desire to secureby Letters Patent- The combination, of a fixed central-draft tube, A,provided with inwardly-projecting studs f, a base-ring, l supported. onsaid studs and provided with an interior scat, f", with see'mmttalopenings f, and with a diametrical U-shaped yoke, (4%, having a soclmt,9 a spi'mlle, G, supported at its lower end in said socket, and providedin its upper end with a shoulder, g, a draft-cone, l supported on theinterior seat of said baseline, and a detlector, G, provided at itslower end. with, a perforated socket, g, which receives the upper end01: said spindleand rests on said shoulder thereof, substantially asdescribed.

In testimony that I claim the foregoing as myinvention I have signed myname in preseneeof two subsm'ibing witnesses.

Al'il ltl ll) O. HRUNNIC.

itnessesz A. E. HALL, JouN \VATSON.

